This dissertation is primarily concerned with the generating plant maintenance scheduling problem of an electric utility in a developing environment as typified by the generating facilities of National Electric Power Authority (NEPA). The importance of this study lies in the fact that system reliability and operating cost of such electric utility a... Continue Reading
This thesis is a report on the design of a high-level programming language for microcomputers, and its associated cross-compiler. The cross-compiler is resident on the University mainframe, and was developed for an M6800 microcomputer. Chapter 1 discusses microprocessors and microcomputers, to establish the appropriate background and to show the ne... Continue Reading
A reliability-based rating of the BS8110 (1985) design criteria for reinforced concrete columns is attempted in this thesis. The rating is based on the First-Order Second Moment Integration Technique. Limit state equations for axially loaded short columns, short columns with bending, slender columns and short columns subjected to biaxial bending ar... Continue Reading
The subject of this thesis is construction risks and the allocation of any loss incurred as a result of their occurrence amongst parties to a contract. This is with the broad aim of improving on the achievement of cost and time t a r g e t s for a project, hence, reducing cases of abandoned projects in Nigeria. To this end, the following objectives... Continue Reading
The BS8110 (1985) is the revised version of CP110 (1972) and is used for the design of reinforced concrete elements. In order to maintain safe designs, partial safety factors are applied to material properties as well as the loadings on the structure. Studies have shown that these factors result in high investment and inconsistensy in the safety le... Continue Reading
This thesis deals with the study of the relative effectiveness of common stabilizers i.e. cement and lime and a by-product of our Steel Rolling Mills i.e. billet-scales on a natural lateritic soil from the site of Ahrradu Bello University Zaria still under construction. It involves the determination of liquid limit, plastic limit, grading analysis,... Continue Reading
This work was carried out to determine the efficiency of slow sand filtration. Graded sand obtained using BS Sieve Numbers 25, 36, 72, 100 and 200 and another obtained using BS Sieve number 14 constructed locally were used. Influent and effluent samples were analysed at intervals for pH, turbidity and bacteriology (Coliform test), so as to determin... Continue Reading
The hardening characteristics of four grades of high-carbon steel materials and ductile iron material were studied. Three of the steel materials were plain high carbon steels with compositions of 0.95%C, 1.05XC and 1.20XC. the fourth steel material was a low-alloy, with 1.205%C and 1.20%W. Standardized specimens were cut from these materials and we... Continue Reading
The characterization of Sokoto phosphate rock and design of process flow-sheet for its beneficiation has been investigated and established. The samples of the Sokoto phosphate mineral ore used for the research work were sourced from mining locations in Dange-Shuni, Bodinga, Yabo, Wurno, and Rabbah Local Government Areas of Sokoto State. Chemical an... Continue Reading
This study has been undertaken to look at some of the air conditioning systems and select one for designing the air conditioning for the second and the third floors of the Mechanical Engineering Department building, Ahmadu Bello University, Zaria. Many types of air conditioning systems are available; an all-air single zone system is selected and de... Continue Reading
This study investigates the concentrations of certain metals absorbed by crops when irrigated with sewage effluents. Amaranthus, tomatoes and maize crops were flood-irrigated with A.B.U., Zaria waste stabilization pond effluents for about 4 months at application rate of 80 litres per day per plot of 4m x 2m. Tapwater was used as control irrigation ... Continue Reading
In the past 25 years, there has been much interest in dielectric films of Zr02 for several applications such as an alternative insulator material in microelectronics, resistance switching and an oxygen anion conductor. Only recently have thin film anion conductors, especially the cubic Zr02 form, been investigated. However, these films will probabl... Continue Reading
The recent energy crisis has led to renewed interest in induction generators as sources of electrical power . This is due to certain advantages they possess. For example, they are of simple construction ; of low cost and rugged. Moreover, they can be easily coupled to many types of motive sources , thus they can be utilised in rural areas of develo... Continue Reading
Colour removal from effluent textile wastewater will greatly improve the quality of water bodies, which is vital to environmental health and sustainability. This study is based on finding more efficient methods of treating the effluent of textile wastewater by removing colour as a contaminant. The effects of concentration of dye solution, tie line ... Continue Reading
Security men play a very important role of protecting lives and properties of people in different places, including residential, industrial or other places of work. Hut due to inadequate provision of facilities that would make their work easy and effective. they face many problems that affect the quality of their service which sometimes lead to ina... Continue Reading